/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.atlas.type;

import org.apache.atlas.exception.AtlasBaseException;
import org.apache.atlas.model.instance.AtlasEntity;

public class AttributeToken implements TemplateToken {
    private final String attrName;

    public AttributeToken(String attrName){
        this.attrName = attrName;
    }

    @Override
    public String eval(AtlasEntity entity) throws AtlasBaseException {
        Object ret = entity.getAttribute(attrName);
        if (ret == null) {
            return null;
        }
        return ret.toString();
    }

    @Override
    public String getValue() {
        return attrName;
    }
}
